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Asthenoceras is a
genus of
ammonoid from the
Middle Jur****ic (Lower Bajocian) with dwarfish, evolute, smooth, compressed, discoidal,
strongly keeled s****...
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species previously described under Fontannesia.
Related genera include Asthenoceras, Fontannesia, Guhsania, and Witc****ia. Sepkoski, Jack (2002). "A compendium...
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Aspenites Asphinctites Aspidoceras Aspidosteph****
Aspinoceras Asteroceras Asthenoceras Astiericeras Astieridiscus Astreptoceras Asturoceras Ataxioceras Atlantoceras...
- more
rounded venter and
Catulloceras has a
subquadrate whorl section.
Asthenoceras from the
slightly younger lower Bajocian may be a subgenus. Sepkoski...
- Berriasian) Argentina A
berriaselline neocomitid, a
species of Andiceras.
Asthenoceras taverai Sp nov
Valid Sandoval in
Sandoval et al
Middle Jur****ic (late...
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Sonninia Sonninites Buckman, 1923 Witc****iinae
Callomon and Chandler, 2006
Asthenoceras Fontannesia Guhsania Newmarracarroceras Hall, 1989 Witc****ia Argentina...
- †Arieticeras †Arnioceras †Arpadites –
tentative report †Aspenites
Astarte †
Asthenoceras †Aviculopecten †Baculites †Belemnites †Bradfordia †Cadoceras †Cadoceras...
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report †Aspenites †Aspenites
acutus Astarte †Astarte
carlottensis †
Asthenoceras †
Asthenoceras nannodes – or
unidentified related form †Astraeomorpha †Astraeomorpha...
